Signed, as an ex 633 and 632 stude.
The ATC had no real bearing on my career trajectory - that was set long before I was old enough to join, however, the wealth of knowledge I gained at those two units, on my squadron (2415) and as a staff cadet at 8 AEF, along with the people I kept company with across the age and rank structure positively affected my life then and now - I had an edge all the way though University, and in to my career as a structures engineer in aerospace, specifically because of what I had been exposed to as a cadet, all that stuff you can never learn in books.
I've watched this thread quite closely, and its been a sad time in the history of the Air Training Corps for a whole raft of reasons.